1、BONE CONDUCTION TECHNOLOGY: Mini bone conduction pillow speaker uses the latest bone conduction technology to deliver sound to your ears through your pillow in a vibrating, compact and portable way. 2、SOFT WHISPERING SOUND: Bluetooth pillow speaker is a soft whisper that helps relieve stress and helps you fall asleep faster. The mini size and low volume design is best suited for side sleepers. 3、BLUETOOTH VERSION 3: Portable pillow speaker uses bluetooth version 3 for stable and clear sound. Built in advanced rechargeable lithium battery that can work for more than 10h and recharge time is only 2h. 4、TIMER FUNCTION: Bone conduction speaker has a timer function, double click the volume plus button to automatically timer off after 60min and double click the volume minus button to automatically timer off after 30 min. 5、DEEP SLEEP: Bluetooth sleeping speaker is designed to relieve stress and help deep sleep. Provides great help for adults and babies to fall asleep and get rid of the trouble of insomnia.